We could not test the hypothesis that men with childhood physical abuse histories—particularly if perpetrated by parents—may be more likely to perpetrate violence against their own intimate partners, children, or both. If we had assessed domestic violence perpetration by our respondents, we would have been mandated by law to report perpetrators. If we had disclosed this requirement when we sought informed consent, we would have biased our study sample or responses. Instead, we asked participants about outcomes, such as depression, sexual risk, substance abuse, and hostility, which previous studies have reported to be associated with dating violence, domestic violence, and other violent criminal behavior (5–8). These outcomes were substantially more common in men with childhood physical abuse histories, providing a circumstantial case that boys who are victims of domestic violence may be more likely to perpetrate domestic violence as adults.